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Default split-window-preferred-direction to 'longest'

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* lisp/window.el (split-window-preferred-direction): Change
default value to 'longest'.
This commit is contained in:
Sean Whitton 2025-11-22 13:20:05 +00:00
parent 54775983ac
commit 75c09b03ed
2 changed files with 16 additions and 15 deletions
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8
etc/NEWS
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@ -392,10 +392,10 @@ for which you can use '(category . tex-shell)'.
+++
*** New user option 'split-window-preferred-direction'.
Users can now choose in which direction Emacs tries to split first:
vertical or horizontal. With this new setting, when the frame is in
landscape shape for instance, Emacs could split horizontally before
splitting vertically. The default setting preserves Emacs historical
behavior to try to split vertically first.
vertically or horizontally. The new default is to prefer to split
horizontally if the frame is landscape and vertically if it is portrait.
You can customize this option to 'vertical' to restore Emacs's old
behavior of always preferring vertical splits.
+++
*** New argument INDIRECT for 'get-buffer-window-list'.

23
lisp/window.el
View file

@ -7532,18 +7532,19 @@ hold:
(* 2 (max window-min-height
(if mode-line-format 2 1))))))))))
(defcustom split-window-preferred-direction 'vertical
(defcustom split-window-preferred-direction 'longest
"The first direction tried when Emacs needs to split a window.
This variable controls in which order `split-window-sensibly' will try to
split the window. That order specially matters when both dimensions of
the frame are long enough to be split according to
`split-width-threshold' and `split-height-threshold'. If this is set to
`vertical' (the default), `split-window-sensibly' tries to split
vertically first and then horizontally. If set to `horizontal' it does
the opposite. If set to `longest', the first direction tried
depends on the frame shape: in landscape orientation it will be like
`horizontal', but in portrait it will be like `vertical'. Basically,
the longest of the two dimension is split first.
This variable controls in which order `split-window-sensibly' will try
to split the window. That order specially matters when both dimensions
of the frame are long enough to be split according to
`split-width-threshold' and `split-height-threshold'.
If set to `vertical', `split-window-sensibly' tries to split vertically
first and then horizontally.
If set to `horizontal' it does the opposite.
If set to `longest' (the default), the first direction tried depends on
the frame shape: in landscape orientation it will be like `horizontal',
but in portrait it will be like `vertical'. In other words, the longest
of the two dimension is split first.
If both `split-width-threshold' and `split-height-threshold' cannot be
satisfied, it will fallback to split vertically.